vtkIntersectionPolyDataFilter检查两个模型是否相交，代码如何实现

你好，关于vtkIntersectionPolyDataFilter检查两个模型是否相交的代码实现，下面是一个简单的示例：

#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataReader.h>
#include <vtkIntersectionPolyDataFilter.h>

int main(int argc, char *argv[])
{
  if(argc < 3)
    {
    std::cerr << "Usage: " << argv[0] << " inputFile1.vtp inputFile2.vtp" << std::endl;
    return EXIT_FAILURE;
    }

  vtkSmartPointer<vtkXMLPolyDataReader> reader1 =
    vtkSmartPointer<vtkXMLPolyDataReader>::New();
  reader1->SetFileName(argv[1]);
  reader1->Update();

  vtkSmartPointer<vtkXMLPolyDataReader> reader2 =
    vtkSmartPointer<vtkXMLPolyDataReader>::New();
  reader2->SetFileName(argv[2]);
  reader2->Update();

  vtkSmartPointer<vtkIntersectionPolyDataFilter> intersectionFilter =
    vtkSmartPointer<vtkIntersectionPolyDataFilter>::New();
  intersectionFilter->SetInputData(0, reader1->GetOutput());
  intersectionFilter->SetInputData(1, reader2->GetOutput());
  intersectionFilter->Update();

  if(intersectionFilter->GetOutput()->GetNumberOfCells() > 0)
    {
    std::cout << "The two models intersect." << std::endl;
    }
  else
    {
    std::cout << "The two models do not intersect." << std::endl;
    }

  return EXIT_SUCCESS;
}

该代码使用了VTK库中的vtkIntersectionPolyDataFilter类，该类可以检查两个多边形数据集是否相交。代码读取两个.vtp格式的文件作为输入，然后调用vtkIntersectionPolyDataFilter类的SetInputData方法设置输入数据，接着调用Update方法计算结果，最后根据结果判断两个模型是否相交。